Not everybody had to be involved in creating food, and so that gave people more time to trade, to develop other products, to be involved in non-food pursuits and many, many more things.

不需要所有人都忙于制造食物,因此人们有空进行贸易,开发其它产品,以追求其他更多,而不单单是食品

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

We are also committed to working together to develop high standard trade and investment rules in the region and promote regional economic integration, consistent with the long-term objective of the APEC economies to develop a Free Trade Area of the Asia-Pacific (FTAAP).

WHITEHOUSE: The White House

Thus trade associations can develop the necessary infrastructure, even when tariffs cannot.

FORBES: Do Tariffs Protect an Infant Industry?

The development of the concept of public debt also allowed cities and nations to finance their commercial expansion and to develop trade, magnifying the need for competitive financial services.

FORBES: Magazine Article